I've used Register is some form or another over the last ten years or so and they've been top notch in terms of performance and customer service. Their prices are competitive with other hosting and domain registration companies. The Register.com website has clearly defined sections that describe all their services well. I can look for and pay for items without any confusion about what I'm buying. They don't try to upsell that much. Review collected by and hosted on G2.com.
The control panel and settings options haven't evolved that much over the years. I think they offer sufficient account management features overall though. Review collected by and hosted on G2.com.